Type 2 Mechanical Seal
Our catalog model WM T2 is built to the John Crane Type 2 style: a rubber bellows seal with a single coil spring. Standard sizes cover inch shafts from 1/2" to 3" and metric shafts from 12 to 75 mm; other sizes are built to order.
We build most John Crane seals, not only Type 2: send the seal part number, a drawing or the old seal. All are equivalents, not sold as genuine OEM parts.
Operating limits · catalog model WM T2
Drawing & dimensions
Type 2 dimension chart
Dimensions in mm unless a table says inches. Inch sizes are named by the nominal shaft size in inches; d1 gives the same size in mm. Letters match the section drawing. Standard sizes shown; other sizes are built from a drawing or the old seal.
| Model(Inch) | Model(metric) | d7 | d2 | d3 | l1 | l3 |
|---|---|---|---|---|---|---|
| WMT2-1/2" | 12 | 25.40 | 19.05 | 30.14 | 20.64 | 7.93 |
| 14 | 31.75 | 23.80 | 33.32 | 22.23 | 10.28 | |
| WMT2-5/8" | 16 | 31.75 | 23.80 | 33.32 | 22.23 | 10.28 |
| WMT2-3/4" | 18 | 34.93 | 26.98 | 36.50 | 22.23 | 10.28 |
| 20 | 38.10 | 30.15 | 39.67 | 23.80 | 10.28 | |
| WMT2-7/8" | 22 | 38.10 | 30.15 | 39.67 | 23.80 | 10.28 |
| 24 | 41.28 | 33.32 | 45.50 | 25.40 | 11.10 | |
| WMT2-1" | 25 | 41.28 | 33.32 | 45.50 | 25.40 | 11.10 |
| WMT2-1 1/8" | 28 | 44.44 | 36.50 | 48.50 | 26.97 | 11.10 |
| 30 | 47.63 | 37.90 | 52.37 | 26.97 | 11.10 | |
| WMT2-1 1/4" | 32 | 47.63 | 37.90 | 52.37 | 126.97 | 11.10 |
| 33 | 50.80 | 42.84 | 56.00 | 28.58 | 11.10 | |
| WMT2-1 3/8" | 35 | 50.80 | 42.84 | 56.00 | 28.58 | 11.10 |
| WMT2-1 1/2" | 38 | 53.98 | 46.05 | 59.20 | 28.58 | 11.10 |
| WMT2-1 5/8" | 40 | 60.38 | 50.80 | 67.00 | 34.93 | 12.70 |
| 43 | 63.50 | 53.97 | 69.85 | 34.93 | 12.70 | |
| WMT2-1 3/4" | 45 | 63.50 | 53.97 | 69.85 | 34.93 | 12.70 |
| WMT2-1 7/8" | 48 | 66.68 | 57.15 | 73.03 | 38.10 | 12.70 |
| 48 | 69.85 | 60.32 | 73.03 | 38.10 | 12.70 | |
| WMT2-2" | 50 | 69.85 | 60.32 | 76.20 | 38.10 | 12.70 |
| WMT2-2 1/8" | 53 | 76.20 | 60.32 | 82.55 | 42.85 | 14.28 |
| WMT2-2 1/4" | 55 | 79.38 | 61.90 | 85.73 | 42.85 | 14.28 |
| WMT2-2 3/8" | 60 | 82.55 | 67.39 | 88.90 | 46.02 | 14.28 |
| WMT2-2 1/2" | 63 | 85.73 | 68.25 | 92.08 | 46.02 | 14.28 |
| WMT2-2 5/8" | 65 | 87.73 | 71.24 | 98.43 | 49.20 | 15.90 |
| WMT2-2 3/4" | 70 | 88.90 | 74.60 | 101.60 | 49.20 | 15.90 |
| WMT2-2 7/8" | 73 | 95.25 | 77.77 | 104.78 | 52.37 | 15.90 |
| WMT2-3" | 75 | 98.43 | 80.95 | 107.95 | 52.37 | 15.90 |
Materials
Materials of construction
- Rotary ring
- Carbon, SiC, tungsten carbide
- Stationary ring
- Ceramic, SiC, tungsten carbide
- Secondary seals
- NBR, EPDM, Viton
- Spring and metal parts
- 304 stainless, 316 stainless
Face pair and elastomer are chosen for the duty; other materials on request.
Cross-reference
John Crane Type 2
WM T2 usually corresponds to the John Crane Type 2. Check the shaft size and the working length against the old seal or its drawing before ordering; if they differ, we build to your dimensions.
Comparing Type 2 with Type 1? See the difference between Type 1 and Type 2 seals, or the Type 1 page.
FAQ
FAQs
Is this a genuine John Crane part?
No. It is our own seal built to the Type 2 style and sold as an equivalent, not as a genuine OEM part.
Can you make a size that is not in the chart?
Yes. The chart lists our standard sizes; other sizes and special faces are built to order. To quote, send the seal part number, a drawing or the old seal.
What do you need for a quote?
The seal part number, a drawing or the old seal, plus the fluid, temperature and pressure if the face pair or elastomer should change.
Request a quote
Send the brand and part number, the seal drawing or a sample of the old seal. As the manufacturer we quote drop-in equivalents, custom and private-label seals at low minimums.